"While Funcom is thrilled with the early success of Age of Conan, and proud of the game launching this week, the company regrets to inform gamers that the DirectX 10 version of the game will not ship with the initial launch. As Microsoft’s DirectX 10 is undoubtedly the future of PC gaming, Funcom has decided to ship only the DirectX 9 version at launch, giving the team more time to focus on building a DirectX 10 version worthy of Microsoft’s great vision for the future of PC gaming. This postponement will let Funcom include even more features in the DirectX 10 version of Age of Conan than originally planned."

Aha, so that's why I can't choose direct X 10. I was starting to think there was something wrong with my vista.Anyway, tried it on the beta, and didn't really notice any differences with 9, except for an increase in crashes and graphical oddities.